Pipe holding slip



y 9, 1933. 1.. c. TILBURY 1,907,685

PIPE HOLDING SLIP Filed June 29, 1931 Patented May 9, 1933 UNITED STATES LYLE C. TILBURY, OF HOUSTON TEXAS PIPE HOLDING SLIP Application filed June 29,

This invention relates to a pipe holding slip.

An object of the invention is to provide a slip of the character described shaped'to be seated in a downwardly converging seat around a pipe to be held and composed of segments having inside, removable, pipe gripping liners, mounted in the respective segments in a novel manner so that said liner when worn or broken may be readily removed for repairs or replacements.

Another object is to provide a segmental slip having pipe gripping liners on the inner faces of the segments thereof which are sercured to the segments 1n such manner as to withstand the strain to which they may be subjected without breakage of parts and which are so fastened in place that'in case of breakage they will not be liable to fall down into the well.

Another object is to provide a sliphaving novel type handles whereby the slip may be easily handled.

With the above and other objects in view this invention has particular relation to certain novel features of construction, operation and arrangement of parts an example of which is givenin this specification and illustrated in'the accompanying drawing, where- 1n:

Figure 1 shows a plan view of the slip. Figure 2 shows a vertical sectional view taken on the line 22 of Figure 1, and

Figure 3 shows a sectional view taken on the line 3-3 of Figure 2.

Referring now more particularly to the drawing wherein like numerals of reference designate similar parts in each of the fig ures the numerals 1, 1 and 2 designate the segments of the slip. At their upper ends these segments have the integral, external, arcuate flanges 3, 3 and 4 respectively, having the external, arcuate, grooves, or mortises, 5, 5 and 6, 6 respectively. There are the arcuate hinge plates 7, 7 which are fitted in the respective grooves 5 and whose ends are extended into the grooves 6, said plates being loosely pinned to the flanges 3 by the pins 8, 8 and working on the hinge pins 9, 9 by means of which they are pivoted to the flange 4.

1931. Serial No. 547,637.

These plates 7 form means for hinging the slip segments together. Fastened to the flange 4: there is a handle 10 and fastened to, and preferably formed integrally with the forward ends of the hinge plates 7 7 are the handles 11, 11. The handle 10 may be of any selected design to form a convenient grip but the handles 11, 11 are, preferably, loop shaped having relatively long grip portions 12, 12. When the slip is to be seated in position around a pipe the front portions of the loops of the handle 11 may be grasped and held while seating the slip, but when the slip is to be swung open and released from the pipe the slip segments will swing out into approximately straight line relation and when in this position the hands of the workmen may be shifted along the grip portions 12 so as to balance the'slip and make it the more easily handled.

The segments have the external, widened,- bearing surfaces 13, 13 and 14, which are convex and downwardly tapered to conform to the contour of and to fit into a downwardly converging supporting seat of a rotary table casing head or other support. The segments may be gradually contracted above said hearing surfaces toward the upper ends thereof, as shown in Figure 2 andtheir lower ends are beveled off as at 15, to facilitate their entry 30 into said supporting seat.

The inner sides of the segments are countersunk providing the upper and lower in wardly extending arcuate retaining flanges 16, 17 and fitted between these retaining flanges are the gripping plates, or liners, 18 whose inner sides are preferably toothed. These liners are arcuate in cross sectional con.- tourto conform to the shape of; and to fit against, the inner sides of the slip segments andto conform to the shape of the pipe to beheld, as well.

Each liner 18 has the upper and lower pairs of clamp bolts 19,19 secured thereto and extending outwardly and arranged substanti ally parallel and which fit loosely through corresponding bearings 20, 20 through the corresponding segments. The outer ends of these clamp bolts have the clamp nuts. 21 screwed thereon and which in place in a central bearing 23 in such se 7 ment and the inner ends of these studs project inwardly and fit snugly in corresponding bearings 24 in said liners 18. These studs 22 and the flanges 16, 17' thus hold the liners firmlyin place and relieve the clamp bolts 19 from the strains. The studs 22 are also arranged approximately parallel with the corresponding bolts 19 so that the liners may be. readily removed and replaced by direct radial movements thereof, relative to the corresponding segments.

As shown each segment has a central, vertical, relative thin web 25 which merges at its upper end into the upper flange 3, or 4- asthe case may be and which merges, at its lower end into the bottom flange 17, and this web 25 is reinforced, on each side with the spaced cross webs 26, 26, for strength. The particular design of the segments may be varied as the circumstances of the case may require. In the form shown the clamp bolts .19, of each pair are arranged on opposite.

sides of the vertical ing segment.

7 The drawing and description disclose what is now considered to be a preferred form of the invention by way of illustration only while the broad principle of the invention will. be defined by the appended claims.

Nhat I claim is:

1. A pipe holding slip shaped to fit in a downwardly converging seat and to surround a pipe,'said slip'being formed of segments, pipe gripping liners on the inner sides of the segments, upper and lower pairs of clamp bolts secured to the liners and extending through the segments, clamp nuts on the bolts securing them against detachment from the segments.

2. A pipe holding slip shaped to fit in a downwardly converging seat and to surround a pipe, said slip being formed of segments, pipe gripping liners on the inner sides of the segments, upper and lower pairs of clamp bolts secured to the liners and extending through the segments, clamp nuts on the bolts web of the correspondr p gripping segments, and reinforcing studs 011 the segments which project into the liners.

l. A pipe holding slip shaped to fit in a downwardly converging seat and to surround a pipe, said slip being formed of segments, liners on the inner sides of the segments, upper and lower pairs of clamp bolts secured to the liners and extending through the segments, clamp nuts on the bolts securing them against detachment from the segments, upper and lower abutments on the segments against which the corresponding ends of the liners abut and anchors on the segments which project into the liners.

5. A pipe holding slip shaped to fit into a downwardly converging seat and to surround a pipe, said slip being formed of segments, a gripping liner on the inner side of each segment, said liner and its corresponding segment being provided one with approximately parallel clamp bolts and the other with bearings to receive said bolts and clamp nuts on the bolts for securing said liner in place, said segment and liner being also provided one with a reinforcing stud and the other with a bearing into which said stud closely fits,

6. In a pipe holding slip a segment, a gripping liner on the inner side thereof, said segment and liner being provided one with substantially parallel connecting means which project through the other and have clamp means thereon to secure the connected parts together, said segment and liner being provided one with an anchor and the other witha bearing to receive said anchor snugly.

7. In a pipe holding slip a segment, a grip ping liner on the inner side thereof and detachable therefrom, a bolt on one of said parts and extending through other part, clamp means on the bolt for securing said parts .together, said segment and liner being also provided one with a reinforcing stud and o the other with a bearing into which the stud closely fits.

In testimony whereof I have signed my name to this specification.

LYLE C. TILBURY.

securing them against detachment from the 

